leonard



(No Model.)

2 Sheets-Sheet l.-

C. N. LEONA-RD, R. B. ROBERTS 8v W. D. AL-LISON. SURGIGAL TABLE.

Patel'lted Apr.v 119,1 1892'.

@wk/f we Nomus ravens co., coro-uwe., wAsNmooN, n. c.

2 Sheets-Sheet 2.

(No Model.)

C. N. LEONARD. R.B. ROBERTS & W. D. ALLISON.

'SURGICAL TABLE.

' Patented A'p1. 19, 18942.

mmf

e @HMM NITED STATES ATENT OFFICE.

CHARLES N. LEONARD, RICHARD B. ROBERTS, AND VILLIAM D. ALLISON, OF INDIANAPOLIS, INDIANA; SAID LEONARD AND ROBERTS ASSIGNORS TO SAID ALLISON.

SURGICAL TABLE.

SPECIFICATION forming part of Letters Patent No. 473,122, dated April 19, 1892.

Application filed July 1'7, 1891. l Serial No. 399,847. (No model.)

T0 all whom it may concern.-

Be it known that we, CHARLES N. LEONARD, RICHARD B. ROBERTS, and WILLIAM D. ALLI- SON, citizens of the United States, residing at Indianapolis, in `tl1e county of Marion and State of Indiana, have invented certain new and useful Improvements in Surgical Tables, of which the following is a specication.

Our said invention relates to various improveinents in the construction and arrangement of parts of surgeons operating-tables, whereby asimple, comparatively inexpensive, and yet strong and durable structure is provided, and one which is easily operated to sevcure the various positions or tilts desired in use, as will be hereinafter more particularly described and claimed.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure l is a longitudinal section.

through a table embodying our said invention, looking in the direct-ion indicated by lthe arrows from the dotted line l l in Fig. 3; Fig. 2, a similar section looking in the direction indicated by the arrows from the dotted line 2 2 in Fig. 4; Fig. 3',atransverse section looking in the direction indicated by the arrows frornthe dotted line 3 3 in Fig. l; Fig. 4, a similar view looking in the direction indicated by the arrows from the dotted line 4 4 in the same ligure; Fig. 5,a detail View, on an enlarged scale, as seen when looking in the direction of the arrows from the dotted line 5 5 in Fig. l, showing the mechanism for adjustably securing the top longitudinally; Fig. (g3, a similar view looking inthe directions indicated by the arrows from the dotted lines l6 6 in Figs. l and 2, showing the mechanism for adjnstably securing the top laterally; Fig. 7, a detail .under side plan looking in the direction indicated by the arrows from the dotted line 7 7 in Fig. 3; and Fig. 8, a detail view illustrating the form of the brace b', which lsupports the hinged portion of the table-top when raised up.

In said drawings the portions markedA represent the main supporting-frame; B, the frame of the top; O, an intermediate frame; D, an arm-rest, and E the foot or leg rest.

In the specification the term forward will be used to designate that end or portion of the table to which the foot-rest is attached, and the tei-1n rear will be understood as referring to the opposite end.

The frame A consists of the four legs, as is usual, and longitudinal side and cross rails securely framed together and constituting a rigid frame of sufficient strength for the purpose. A shelf A is supported upon a frame consisting of cross-pieces extending between the legs near their lower ends, and longitudinal pieces extending between and framed to said cross-pieces. Said shelf may be used for the support of the instrument-case, cabinets, or any other service desired.

The frame B of the top consists of a rectangular structure composed of two longitudinal and two cross rails securely framed together and forming the outside edges of the top structure, a series of cross-bars b being secured in the structure between said end rails. The top B is made in two parts, one of which covers the front of the frame B, or that portion to which the foot-rest is attached, and the other portion of which covers the opposite end of said frame being hinged to the forward portion at a point above the central cross-bar ZJ. To the under side of said hinged portion is pivoted a brace b', which preferably consists of a rod bent to form a` short transverse portion in its center, withits sides extending forward at an angle to near the .sides of said top, where its ends, being bent into a transverse position, are iournaled in ears secured thereon. The central portion of said brace-rod is arranged to engage with notches formed in the top edge of a longitudinal bar b2, which is framed into and extends from the central cross-bar b to the rear rail of the top frame. By this arrangement said hinged partof the top may be adjusted to and secured at any angle desired, as plainly indicated by dotted lines in Fig. l.

The intermediate frame consists of a central bar C, extending longitudinally of the table, its forward end being adapted, when the table-top is in a horizontal position, to rest on the forward rail of the frame A and its rear end extending back to a point just in front of the rear rail of said frame, and a transverse bar G4, framed thereto about midway between its ends, which is hinged by hinges c to the upper edge of a similar bar ct, extending between the side rails of the frame A in a position a little forward of the middle of the struct-ure. The hinges c, by which said frame C is hinged to said cross-bar c, are formed so that there will be a space between the two parts of which they are composed when the table-top is in ahorizontal position, thus permitting the frame C and the top which is supported thereon, as will be presently described, to tilt back, as indicated by dotted lines in Fig. l. To the rear end of the longitudinal bar of the frame C is firmly secured a T-shaped rack-bar e', the end of said bar C resting in one of the angles of said T, which is thus fastened to two sides thereof, forming a very secure connection. To the front side of the rear rail of the frame A is secured a housing d', having a sliding plate A2 mounted therein, with a pawl a2 formed on its front side, which is adapted to engage with the notches on the rear face of said rackbar c. Said sliding plate A2 is normally held forward, with the pawl (t2, formed on the front side thereof, in engagement with said rackbar c', by meansof a spring d3, one end of which is connected with the forward end of said plate and the other end with the side of the frame. Said plate is drawn back and the pawl disengaged, when desired, by means of a foot-lever A3, hinged at its forward end to one of the longitudinal bars of the frame snpporting the shelf A and connected near its outer end by a connecting-rod of' with one end of a bell-crank lever A4, which is pivoted at its angle to the inner face of one of the legs and at the otherl end is connected by a link d to the rear end of the pawl a2, formed on the front side of said plate A2, said rear end being curved down, as shown. By this arrangement, as will be readily understood, the said frame C and the table-top mounted thereon are enabled to be held either in a horizontal position, as shown in whole lines in Fig. l, or may be adjusted to and secured in the position indicated by dotted lines or any of the Various intermediate positions.

To the top edge of the longitudinal bar C the top frame is secured by means of hinges b3, one of said hinges being secured between each of the cross-bars b thereof and the adjacent part of said bar. 'lhe hinges b3 are of a construction similar to the construction of the hinges c, which permit said frame to be rocked in either direction on said hinges, thus permitting the top to be inclined in either direction, as indicated by dotted lines in Fig. 4. Said top is secured in the transverse position desired by means of a curved dependiugrack-bar B2, pivoted at its upper end to the central bar b, with its outer face serrated or notched and adapted to engage with a similarly-formed face of a plate o2, rigidly secured to the end of the cross-bar C4 of the intermediate frame. A lever c3 is pivoted to said cross-bar and formed with a ca1n-face on one end, adapted to bear against the inner edge of said bar B2 and force it into engagement with said plate c2, thus securing it in position. To the lower end of said bar B2 is connected one end of a coiled spring b, the other end of which is connected to the frame, said spring thus normally operating to pull said bar out of engagement with the plate c2 when released. rlhe outer end of the cau1lever c3 is connected by means of a link to a bell crank a5 at its angle, which is secured to and extends up from a short rock-shaft A5, which is journaled in suitable bearings, one on the front side of the cross-bar a and the other on the rear side of the front rail of the frame A. To the end of the horizontal arm of said bellcrank is connected a spring A, of greater tension than the spring L, the other end being attached to a iixed point on the frame. Near the forward end of the rockshaft A is secured an outwardly-projecting arm AB, the point of which is connected by a connectingrod a7 with a foot-lever A7, hinged at its forward end in a suitable bearing secured on a part of the frame supporting the shelf A near the forward end thereof. By this arrangement the spring A, being of a greater tension than the spring h, operates to normally hold the cam-face of the lever c3 [irml y pressed against the inner edge of the arm 152, holding it firmly in engagement with the notches of the plate c2, and thus securely locking the top of the table in whatever side inclination it maybe adjusted. lVhen it is desired to change the adjustment, the foot-lever AT is depressed, which rocks the rock-shaft A5 outwardly, throwing the bell-crank d5 in the same direction and through the connecting-link lifting the ca1n-face of the lever c3 away from the rack-bar, when the spring' b4 operates to withdraw said bar 'from engagement with the plate c2, permitting the table top to be tilted to the position desired, when the foot-lever is released and the spring A, by reason of its greater tension, operates to again force the notched bar B2 into engagement with the notched plate c2, thus locking the top in the position. The notches in the plate c2 and in the bar B2 being pointed, as shown, the two faces will readily engage in whatever position the top may be adjusted, as will be readily understood.

The arm D is of suitable width, having a plate with a hooked-shaped dog (l secured to its under side, which is adapted to be inserted in a similarly formed socket in the plate D', secured to the side of the table. Said plate is preferably pivoted to the under side of said arm-rest on a pivot d and has a wide fa11tailshaped end, the edge of which is an arc of a circle having the pivot d for its center. Hooked-shaped corners are formed at each side thereof, as shown, and a stop-pin (Z2 is secured centrally in said arm-rest be tween said corners of the plate, its head be- IOO IIO

ing preferably formed enlarged to engage the edge of said plate and steady it in position. By this arrangementthe arm maybe adjusted to any angle desired within the limit of the stops thus provided, it being held in position by the weight of the arm bearing down and causing the dog d to impinge or bite upon the socket on opposite sides at different points, as will be readily understood.

A foot-rest E is also hinged to the front side of the table, beingA supported in a horizontal position by means of a jointed bracerod E', so arranged that the joint thereof will be above the line of the direction ot' the strain caused by the weight thereon, the end of the long part of which is hinged to the lower corner of the front rail of the top frame B and the end of the short part of which is secured to the forward or hinged part of the foot-rest. By this arrangement as the footrest is raised from a vertical to a horizontal position its hinged part is straightened out inl line with the main part, and as it is lowered said hinged part is turned to a position at right angles with the main part when down. A lip e is formed to project back from the forward portion of the brace, with which a catch e, pivoted on the under side of the main portion of the foot-rest, engages when in the vertical position, thus holding the joint in position to support the parts, guarding against any accidental knocks or jars which might otherwise disturb its position. To the back side of said foot-rest is secured a bearing-plate E2, and a curved supporting-brace E2 is secured to the forward portion of the frame A, its curved part extending forward therefrom and serving as a rest against which the plate E2 may bear. The outward inclinationof said supporting-brace is sufficient to still furnish a support against which the plate E2 may bear when the table-top is tilted back to any position to which it may be adjusted. By this means the Weight of the person stepping upon said foot-rest is largely thrown against said supporting-brace instead of entirely upon the hinges of the foot-rest, and said foot-rest is thereby prevented from being broken from its hinges, as is often the case when no additional support is provided. Brackets c2'are also 'secured to the front corners of the frame B, which are curved forward and serve as further supports against the twisting strain upon the foot-rest When the weightis placed upon one side thereof.

A stirrup-iron may also be used in connection with the table, as indicated by dotted lines in Eig. 2, if desired; but such iron, forming no part of our present invention, i-s not particularly described herein.

The operation of the table will be readily understood from the foregoing description, it being only necessary when a longitudinal tilt is desired to press down upon the foot-lever A3, which releases the pawl from the bar c2 on the rear end of the frame C and permits any adjustment desired and any side adjustment or tilt being secured by 'pressing down the foot-lever A7, as has been fully described. lVhen it is desired to support the subject being operatedupon at any degree of elevation, the hinge portion of the top B is lifted up to the angle desired, and' there it is held by means of the brace b', it being possible to secure this portion of the top in a vertical position, if desired, thus converting the table into a chair for temporary uses when desired.

Having thus fully described our said invention, what we claim as new, and desire to secure by Letters Patent, is-- 1. In a surgical table, the combination of the main frame, the intermediate frame hinged to-a cross-bar of said main frame on hinges extending transversely thereof, the rear end of which extends to a point in front of the rear rail of the main frame, the rack-bar secured to the rear end of said intermediate frame, the sliding plate having a pawl on its face, mounted to slide in a housing on the front side of the rear rail of said main frame, .with its pawl adapted to engage with the notches of said rack-bar, means for operating said sliding plate back and forth, and the top frame hinged by means of longitudinally-arranged hinges to the top of said intermediate frame, and means, substantially as described, for holding said top frame in the desired transverse adjustment.

2. In a surgical table, the combination of the main frame,theintermediateframehinged to a cross-bar of said main frame on hinges arranged transversely thereof, a rack-bar sej cured to the rear end of said intermediate frame, the plate A2, mounted to slide in a housing on the front side of the rear rail of the main frame and formed with a pawl a2on its front face, adapted to engage with said rack-bar, the spring d2 for holding said plate forward with the pawl in engagement with said rack-bar, the elbow-lever A4, pivoted on the frame,with one end connected to said sliding plate and the other end connected to a foot-lever, whereby said plate is drawn back to disen gage said pawl whendesired, and the top frame and table-top mounted on said intermediate frarne, all substantially as set forth.

3. The combination, in a surgical table, of the main frame,the intermediate frame hinged to tilt longitudinally, means for supporting said intermediate frame in a fixed position, the top frame hinged to said intermediate frame on hinges secured longitudinally thereof, the serrated bar B2, depending from said top frame, a serrated plate secured rigidly to a portion of the intermediate frame and arranged to engage said depending bar, the spring b4, connected at one end with the lower end of said depending bar and at the other end with the fram-e, the cam-.1everc3, arranged as described and connected with the arm a5 on the rock-shaft A5,the spring A6, connected at one end with said arm a5 and at the other end with the frame, andthe arm AS, also formed `on said rock-shaft and connected by a rod IOO IIO

with the foot-lever A7, said foot-lever suitably hinged to the lower portion of the frame, said spring A being of a greater tension than the spring b4, all substantially as described, and for the purposes specified.

4. In a surgical table, the combination of the main frame, the intermediate frame hinged to a cross-bar of said main frame to tiltlongitudinally thereof, the rack-bar secured to the rear end of said intermediate frame, the sliding pawl mounted on the main frame and adapted to engage with said rack-bar, means for operating said pawl, the top frame hinged to said intermediate t rame to tilt transversely thereof, the depending raclobar B2, hinged to one side of said top frame and adapted to engage with a fixed notched plate on the intermediate frame, and means for withdrawing said bar from and forcing it into engagement with said plate, as desired, all substantially as set forth.

5. The combi n ation, in a surgical table, with the top frame thereof, of the arm-rest D, having a plate with a curved dog d pivoted thereto, said plate being formed with acurved or recessed edge with shoulders at or near each side, and a pin inserted in the under side of said ar1n-rest against said edge and between said shoulders, whereby said arm-rest is permitted a limited motion, said dog being inserted in a correspondingly-formed socket secured in the side of said top frame, all substantially as set forth.

G. The combination, in a surgical table, of the foot'rest hinged to its front side, the bearing-plate E2, secured on the rear side thereof, and a curved supporting-brace E, secured to and extending out from the frontside of said rame and arranged to support said foot-rest when in a closed-down position through said bearing-plate E2, substantially as set forth.

7. The combination, in a surgical table, of a foot-rest hinged to its front edge and ajointed brace for supporting said foot-rest, said footrest being composed of two parts hinged together and said supporting brace being formed of a long and short part, the short portion of which is xedly connected with the front portion of the foot-rest and the long portion of which is hinged to the frame of the table, a lip e being formed to extend back from said short portion, and a catch e being pivoted to the under side of the main portion of the foot-rest and arranged to engage therewith when said foot-rest is raised to a horizontal position, whereby it is held against accidental displacement, snbstanti ally asset forth.

S. The combination, in a surgical table, of a foot-rest hingedto its front edge and formed in two parts hinged together and the brace E', hinged to the top frame at one end and secured to the forward portion of said foot-rest at its other end, said brace being formed with a joint at a point which when turned up will be above the line of the direction of the strain thereon.

In witness whereof we have hereunto set our hands and seals, at Indianapolis, lndiana, this 20th day of May, A. l). 1891.

CHAS. N. LEONARD. L. sj]

RICHARD B. ROBERTS. [51.. s l

XVM. D. ALLISON. |AL. s]

lVitnesses:

E. W. BRADFORD, FRANK XV. foon 

